HID: asus: ROG NKey: Ignore portion of 0x5a report

On an Asus G513QY, of the 5 bytes in a 0x5a report, only the first byte
is a meaningful keycode. The other bytes are zeroed out or hold garbage
from the last packet sent to the keyboard.

This patch fixes up the report descriptor for this event so that the
general hid code will only process 1 byte for keycodes, avoiding
spurious key events and unmapped Asus vendor usagepage code warnings.

Signed-off-by: Josh Kilmer <srjek2@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 08c9a9a60ae47a54045aa834aeb92b431205550b..b59c3dafa6a48de3cebd53e14c2475e01485dd6a 100644 (file)
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -1212,6 +1212,13 @@ static __u8 *asus_report_fixup(struct hid_device *hdev, __u8 *rdesc,
                rdesc = new_rdesc;
        }
 
+       if (drvdata->quirks & QUIRK_ROG_NKEY_KEYBOARD &&
+                       *rsize == 331 && rdesc[190] == 0x85 && rdesc[191] == 0x5a &&
+                       rdesc[204] == 0x95 && rdesc[205] == 0x05) {
+               hid_info(hdev, "Fixing up Asus N-KEY keyb report descriptor\n");
+               rdesc[205] = 0x01;
+       }
+
        return rdesc;
 }